With simple program, foo.f: [begin literal] program foo implicit none logical*4 e e = .true. stop end [end literal]
I get these results: $ /usr/bin/gfortran -g foo.f -o foo harryr@HARRYR-PC ~ $ gdb GNU gdb (GDB) (Cygwin 7.10.1-1) 7.10.1 Copyright (C) 2015 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-pc-cygwin". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word". (gdb) file foo Reading symbols from foo...done. (gdb) tb foo.f:1 Temporary breakpoint 1 at 0x4011d6: file foo.f, line 1. (gdb) r Starting program: /cygdrive/c/Users/harryr/foo [New Thread 8148.0x1fd8] [New Thread 8148.0x1d24] gdb: unknown target exception 0x406d1388 at 0x759cc54f Program received signal ?, Unknown signal. 0x759cc54f in RaiseException () from /cygdrive/c/Windows/syswow64/KERNELBASE.dll (gdb) Please help.
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